|
| US3959544 | 26. Dez. 1973 | 25. Mai 1976 | | Filamentary tape constructions and methods |
| US3974599 | 20. März 1975 | 17. Aug. 1976 | Indian Head Inc. | Underground reinforced plastic enclosure |
| US6054647 | 26. Nov. 1997 | 25. Apr. 2000 | National-Standard Company | Grid material for electromagnetic shielding |
